It can be thrilling to fly your drone at top speed low to the ground, but that's also asking for trouble, since accidents can be quite expensive. Owners of DJI drones, the Phantom or the Inspire, can now push the limit without worrying about covering the full cost of repairs. The drone maker is now selling what it calls DJI Care — a basic insurance plan to reimburse customers for their drone repairs. The damage has to come from normal use, so if you chip the drone or somehow disconnect...